"To find the leak" means to identify the source of a problem or issue that is causing information, gas, fluid, or something similar to escape or be lost. Full definition
They can make sure everything is safe and working properly so that a potential buyer doesn't find a leaking faucet or broken light switch or faulty outlet. (rismedia.com)
The wheels — are they solid or do you request to try to find leaks in air anxiety as well as stress and anxiety in them? (bestbabystrollerhq.com)
I have been wanting a thermal imaging camera to help find leaks ever since we bought this house. (treehugger.com)